Merge "Add content description for output switcher chip" into sc-dev am:...

Merge "Add content description for output switcher chip" into sc-dev am: c970cc4a am: 3e1fa896 am: d48caeb8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15109833

Change-Id: I7801f24460ef063967d6e8d203eef0a5c08222de